Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:52:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0, f, k; i < V[n].size() && succes == 0; i++) ^ user.cpp:58:21: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] if ((A[n] >> bit & 1 ^ 0) == (k >> bit & 1)) ^ user.cpp:66:21: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] if ((A[n] >> bit & 1 ^ A[f] >> bit & 1) != (k >> bit & 1)) ^ user.cpp: In function ‘void rez()’: user.cpp:110:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < V[n].size(); i++) ^